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Streptococcal infections


Streptococci are part of the normal human microbiota and occur in a variety of serotypes. Some of these are clearly pathogenic, while others are opportunistic.
Depending on the virulence factors present and the serotype, Strep infections can range from Strep throat to toxic shock syndrome.


Group A Streptococcus: S. pyogenes

Pharyngitis (Strep throat)

Scarlet fever

Pyoderma (impetigo)



Necrotizing fasciitis

Toxic Shock Syndrome

Rheumatic fever

Acute glomerulonephritis

Group B Streptococcus: S. agalacticae

Viridans Streptococci

S. pneumoniae